Like many musicians of the era, Bach reused his own melodic and harmonic material in combination and recombination that suggest possible lost "alternative" versions of favorite works. Fascinated by that possibility, performers Giorgio Sasso and Salvatore Carchioli conducted extensive research into authentic source material and reconstructed several concertos which "could have existed." The artists' superlative understanding of Bach's instrumental oeuvre is apparent in the sensitive decision-making that ties the project together. A fascinating dive into the mind of a Bach whom, were it not for the ravages of time, we very well might have known.